HARARE, Zimbabwe (CNN) -- African leaders said Monday they have failed to broker a power-sharing deal between Zimbabwe's president and opposition leader and urged neighboring countries to help end Zimbabwe's crisis.

The announcement from members of the Southern African Development Community came after a day-long meeting in Harare.

Several leaders from the 12-member group met with Zimbabwe opposition leader Morgan Tsvangirai and President Robert Mugabe in a bid to salvage the power-sharing deal signed by them last month.

Under the agreement, Tsvangirai, who heads the Movement for Democratic Change, would become prime minister and Mugabe would remain president.

The arrangement has not taken effect as the two sides have argued over who should control which ministries. The meeting in Harare failed to break this impasse, said Tomas Salomao, executive secretary of SADC.

Salomao urged neighboring countries to help Zimbabwe stating that another summit will be convened in South Africa or in Botswana soon.

"The people of Zimbabwe are faced with difficult challenges and suffering that can only be observed once an inclusive government is in place," he said.

Tsvangirai said Saturday he wanted to end the deadlock, but warned he will not be pushed around.

"When it comes to negotiations we fear no one," Tsvangirai said Saturday, speaking to a crowd in Marondera, a farming town about 70 kilometers (43 miles) east of the capital, Harare.

The regional summit failed to take off in Swaziland last week when Tsvangirai could not attend because Mugabe's government denied him a passport, prompting MDC accusations that the president is acting in bad faith.

The power-sharing agreement was to end months of turmoil and violence that followed the country's March presidential elections. Tsvangirai garnered the most votes in March but did not win enough to avoid a runoff with Mugabe, who has ruled the country since its independence from Britain in 1980. Watch how Zimbabweans are now scavenging for food »

The MDC leader withdrew days before the June 27 runoff with Mugabe, alleging that Mugabe's supporters had waged a campaign of violence and intimidation against opposition supporters. He said he could not participate in the election.

On Saturday, Tsvangirai said those responsible for the violence leading up to the runoff must be brought to justice.

Once a prosperous nation, Zimbabwe now faces acute shortages of essentials such as fuel, electricity, cash, food and medical drugs. The inflation rate officially stands at more than 200 million percent, though independent analysts put it at more than 1 billion percent.